Table 1.

Result of system usability evaluation based on Nielsen’s 10 principles.

Items	Score 1	Score 2	Score 3	Score 4	Score 5	Average score
Visibility of system status (very confusing to very clear)	0	0	1	1	2	4.25
Match between the system and the real world (irrational to very logical)	0	1	2	1	0	3
User control and freedom (this is not possible to this is very convenient)	0	0	0	4	0	4
Consistency and standards (vague to clear)	0	0	1	3	0	3.75
Error prevention (never to always)	0	0	0	4	0	4
Recognition rather than recall (from inappropriate to appropriate)	0	1	0	0	3	4.25
Flexibility and efficiency of use (very inappropriate to very appropriate)	0	1	1	1	1	3.5
Aesthetic and minimalist design (very inappropriate to very appropriate)	0	0	1	1	2	4.25
Recognize, diagnose, and recover from errors (never to always)	0	1	0	2	1	3.75
Help and documentation (inadequate to appropriate)	0	1	1	2	0	3.25